/Engine/Source/Runtime/GeometryCore/Public/VectorTypes.h
Computes the Angle between V1 and V2, assuming they are already normalized
the (positive) angle between V1 and V2 in degrees
namespace UE { namespace Geometry { template<typename T> T UE::Geometry::AngleD ( const [UE::Math::TVector](API\Runtime\Core\Math\TVector)< T > & V1, const [UE::Math::TVector](API\Runtime\Core\Math\TVector)< T > & V2 ) } }